Electronic gimbal system

H - Electricity – 04 – N

Patent

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Details

H04N 3/227 (2006.01) G01S 3/786 (2006.01) H04N 5/232 (2006.01) H04N 5/30 (2006.01)

Patent

CA 2093160

This invention is directed to an electronic gimbal system (10) which stabilizes a digital video image of a particular scene taken by a sensor which is under disturbance forces. The video image is stored as a two-dimensional array of pixel locations (12) and is applied to an address look-up calculator (14) along with a signal from an inertial sensor (16). The inertial sensor (16) determines the offset of the array of pixel locations from an inertial reference frame and adjusts the input array accordingly. In one particular implementation, the address look-up calculator (14) applies a bilinear interpolation to the pixel location in order to provide a weighted sum of pixel intensities for each offset pixel location.

L'invention porte sur un cardan électronique (10) servant à stabiliser une image vidéo numérique d'une scène donnée captée par un analyseur soumis à des forces perturbatrices. Cette image vidéo est stockée sous la forme d'un réseau bidimensionnel de pixels (12) et est transmise à un calculateur de consultation d'adresses (14) avec un signal provenant d'un capteur inertiel (16). Ce capteur inertiel (16) détermine le décalage du réseau de pixels à partir d'un cadre de référence inertiel et ajuste le réseau d'entrée en conséquence. Dans l'une des concrétisations particulières de l'invention, le calculateur de consultation d'adresses (14) effectue une interpolation bilinéaire sur les pixels pour obtenir une somme pondérée des intensités de tous les pixels.

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